//  Get input from root file.

// Version 0.00 18-Nov-1998 RXD Creation
//              31-Mar-1999 jrb Move to Util (libRootAppsUtil)


#include "readRootFile.h"
#include "TBranch.h"

ClassImp(readRootFile)

//______________________________________________________________________
// readRootFile 
//
// EventSource reading from root file

 readRootFile::readRootFile(Char_t* rootFileName) {
  // constructor

   FILE* parFile;
   if(!(parFile = fopen(rootFileName,"r"))){
     printf("Root file %s could not be openedn", rootFileName);
     return;
   };

   int parfileStatus = fclose(parFile);
      
   // set up root

   m_event = new Event();

   m_rootFile = new TFile(rootFileName);
   T = (TTree*)(m_rootFile->Get("T"));

   T->SetBranchAddress("Event",&m_event);

   Int_t nEntries = T->GetEntries();

   printf("Using Root file %s with %i entries n",
	  rootFileName,nEntries);
   
   m_nEvent = 0;
}

 readRootFile::~readRootFile() {};

 Int_t readRootFile::getEvent(Event* event) {
  // get next event

   Int_t nBytes = T->GetEvent(m_nEvent);

   m_nEvent++;

   return nBytes;
};